well I don't have the gov. any more so cant help you out on the speed control. I would look at when the micro closes to send power to the solenoid, mine was closing with the throttle open causing it to start at a higher rpm and not able to go slow. I also think that that was causing the back fireing as I tookk my foot off to slow down I was still drwaing fuel in without spark then when pushed it back ,bang.
My motor blew last week (20years old) so when I pulled the top end off my exaust gasket was trashed (less than a year old). so for me I am going to replace the motor mounte and exaust gasket as well at the top end of the motor as soon as I get the $$$$. If it is still loud I an going to through on a cheep cheery bomb muffler after the stock one to help out on the noise.
